| 摘要 |
PURPOSE:To execute the succeeding transmission command word and to continue communication by another communication processor when the current data communication is disabled by setting up ''1'' on an untransferred flag in a transmission command word by an untransferred flag adding circuit and removing the transmission command word from a transmission queue. CONSTITUTION:Disabled reception is detected by a disabled reception detecting circuit 3-100 of each transmission processor in a multi-data communication system and transmitting operation is repeated by a transmission control 3-108 until a retry-over detecting circuit 3-104 on the transmission side is set up. If transfer operation can not be executed, the disabled transfer is detected by the detecting circuit 3-104 and ''1'' is set up in the untransferred flag to actuate the untransferred flag adder 3-105. The untransferred flag assigned to a transfer command word in a transfer command word group of an internal memory 3-106 is set up and the transmission command word in the memory 106 is removed from a chain on the basis of a command from the detecting circuit 3-104 through a command word control circuit 3-107 to process the succeeding transmission command word. |
